I'd rather educate users than waste my time trying to stop scammers. One can be done, the other is an exercise in futility. You have to rely on the community for such things, as by the time I've heard about an impersonator, the scam attempt has already been made. It's the first contact users that need to be educated.
I use the default trust settings, but I've got a much larger trust network than you, so I imagine that is what is causing you to see me as less trusted.
It would take me a matter of seconds. Probably wouldn't take an outrageous amount of time to get the last part to match my ifMe as well. That is why users shouldn't rely on what looks right, and should use a fool proof method like making sure you get the address from a trusted source.